connect(findPB, SIGNAL(clicked()), this, SLOT(findClicked()));
connect(replacePB, SIGNAL(clicked()), this, SLOT(replaceClicked()));
connect(replaceallPB, SIGNAL(clicked()), this, SLOT(replaceallClicked()));
connect(findPB, SIGNAL(clicked()), this, SLOT(findClicked()));
connect(replacePB, SIGNAL(clicked()), this, SLOT(replaceClicked()));
connect(replaceallPB, SIGNAL(clicked()), this, SLOT(replaceallClicked()));